Quoting Solnabo (Thread starter):My question is: wich airline do I take? Swiss, Austria or Lufthansa and what airport are the closest to Schrunz?

The place name is Schruns, and the closest airport is INN. If you fly to INN, and don't have a car, you'll have to take a train from Innsbruck to Bludenz and there do the connection with the MontafonerBahn to Schruns.